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Energy Exercise

Definitions of Basic Concepts in Energy Pathways

Match the definitions with the correspondiong letter.

A. Activation Energy    B. Active Site of Enzyme    C. Competitive Inhibitor    D. Organic Catalyst    E. 1st Law of Thermodynamics    F. Lock and Key Mechanism    G. 2nd Law of Thermodynamics    H. Exergonic Reaction      I. Endergonic Reaction



____     Speeds up a chemical reaction without taking part in the reaction.


____     The shape of the substrate matches the shape of the active site of an enzyme.


____     The site on an enzyme that combines with a substrate.


____     A reaction that needs energy input before it can proceed.


____     The energy needed to start a reaction.


____     A reaction that releases energy


____     Energy cannot be created or destroyed but  can be converted from one form to another.


____     When energy is converted from one form to another, some energy is wasted as heat.


____   Takes the place of a substrate and combines with the active site of an enzyme, thus blocking the actual substrate from attaching to the enzyme.



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